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Betsy Andrews, Co-PI University of Colorado,

Measurements of aerosol optical properties at Cape San Juan. Betsy Andrews, Co-PI University of Colorado, Cooperative Institute for Research in Environmental Sciences (CIRES) and NOAA, Earth Systems Research Laboratories (ESRL), Global Monitoring Division (GMD).

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Betsy Andrews, Co-PI University of Colorado,

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  1. Measurements of aerosol optical properties at Cape San Juan Betsy Andrews, Co-PI University of Colorado, Cooperative Institute for Research in Environmental Sciences (CIRES) and NOAA, Earth Systems Research Laboratories (ESRL), Global Monitoring Division (GMD)

  2. Cape San Juan aerosol sampling inlet Standard NOAA/ESRL/GMD design Splitter provides 4 additional 30 lpm sampling lines (not shown) Easy to add additional instrumentation One spare line is stainless steel

  3. Current collaborative measurements at Cape San Juan Continuous aerosol measurements since November 2004: total and back scattering (450, 550, 700 nm) absorption (467, 530, 660 nm) two size cuts: 10um and 1um • Derived parameters: • Aerosol single scattering albedo • Angstrom exponent • Backscatter fraction • Asymmetry parameter • Sub-um fraction • Radiative forcing efficiency (TOA) Aerosol system also logs aethalometer data and has capability to log various TSI particle counters, DMT CCN, and raw serial data streams. All instruments have same time stamp http://www.esrl.noaa.gov/gmd/aero/net/cpr/index.html#plots

  4. ALT EUR BRW SUM TIK ETL FKB WHI WSA EGB KPO HMT SPL WLG AMY APP THD BND GRW ARN PYE HFE KOS SGP CSJ LUL NIM MLO SMO CPT LegendNOAA affiliate future/proposed sites former sites SPO

  5. 10 Visibility (km) 100 Extinction (Mm-1) 1000 Very Clean Dirty Dust Seasalt Smaller Angstrom Exponent

  6. Additional collaborative measurement for AD project Aerosol hygroscopicity – f(RH) f(RH) = scattering (RH=85%) scattering (RH=40%) TSI Neph RH~40% Sample in To pumps RR Neph RH~85% humidifier To pumps RR neph= Radiance Research M903 nephelometer 1 wavelength (~530 nm), total scattering only Needs: DI water, 2-3x/week maintenance (reservoir fill)

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